Aerodynamic data banks for Clark-Y, NACA 4-digit and NACA 16-series airfoil families

With the renewed interest in propellers as means of obtaining thrust and fuel efficiency in addition to the increased utilization of the computer, a significant amount of progress was made in the development of theoretical models to predict the performance of propeller systems. Inherent in the majority of the theoretical performance models to date is the need for airfoil data banks which provide lift, drag, and moment coefficient values as a function of Mach number, angle-of-attack, maximum thickness to chord ratio, and Reynolds number. Realizing the need for such data, a study was initiated to provide airfoil data banks for three commonly used airfoil families in propeller design and analysis. The families chosen consisted of the Clark-Y, NACA 16 series, and NACA 4 digit series airfoils. The various component of each computer code, the source of the data used to create the airfoil data bank, the limitations of each data bank, program listing, and a sample case with its associated input-output are described. Each airfoil data bank computer code was written to be used on the Amdahl Computer system, which is IBM compatible and uses Fortran

Enhanced Accessibility for People with Disabilities Living in Urban Areas

[Excerpt] People with disabilities constitute a significant proportion of the poor in developing countries. If internationally agreed targets on reducing poverty are to be reached, it is critical that specific measures be taken to reduce the societal discrimination and isolation that people with disabilities continue to face. Transport is an important enabler of strategies to fight poverty through enhancing access to education, employment, and social services. This project aims to further the understanding of the mobility and access issues experienced by people with disabilities in developing countries, and to identify specific steps that can be taken to start addressing problems. A major objective of the project is to compile a compendium of guidelines that can be used by government authorities, advocacy groups, and donor/loan agencies to improve the access of people with disabilities to transport and other services in urban areas

Sobre algunas Gelidiáceas nuevas o poco conocidas de las costas españolas

In this paper a new locality of Tenerife Island is made known for Gelidiella tinerfinsisJ. Seoane-Camba. Likewise, San Vicente de La Barquera (Santander) is made known as a new locality in the spanish shore for Gelidiella tenuissima J. Feldmann y G . Hamel. On the other hand a comparative study between Gelidium cartilagineum (L.) Gaillon, from El Cabo, and Gelidium cartilagineum (L.) Gaillon var. canariensis Grunow, from Tenerife, is made. We conclude that both taxa are different species and we propose the name Gelidium canariensis (Grunow) nov. sp. for the canary plant. Finally we describe a new species of Gelidium, that has been find at Cantabria, with the name Gefidium cantabricum nov. sp.En esta comunicación damos a conocer una nueva localidad de la isla de Tenerife para Gelidiella tinerfinsis J. Seoane- Camba, e igualmente se cita Gelidiella tenuissimaJ. Feldmann y G. Hamel en San Vicente de La Barquera (Santander) como nueva localidad para las costas españolas. Se hace un estudio comparativo de Gelidium cartilagineum (L.) Gaillon, procedente de El Cabo, y Gelidium cartilagineum (L.) Gaillon var. canariensis Grunow de Tenerife, llegando a la conclusión de que las posibles afinidades morfológicas e histológicas entre ambos taxa no existen, o son tan lacias como las que pueden existir entre cualesquiera especies de Gelidium. Por ello proponemos el nombre de Gelidium canariensis (Grunow) nov. sp. para la planta canaria. Finalmente se describe una nueva especie de Gelidium, encontrada en la costa cantábrica de la Península Ibérica, con el nombre de Gelidium cantabricum nov. sp

Teachers as designers of formative e-rubrics: a case study on the introduction and validation of go/no-go criteria

[EN] Information and Communications Technologies (ICTs) offer new roles to teachers to improve learning processes. In this regard, learning rubrics are commonplace. However, the design of these rubrics has focused mainly on scoring (summative rubrics), whereas formative rubrics have received significantly less attention. ICTs make possible electronic rubrics (e-rubrics) that enable dynamic and interactive functionalities that facilitate the adaptable and adaptive delivery of content. In this paper, we present a case study that examines three characteristics to make formative rubrics more adaptable and adaptive: criteria dichotomization, weighted evaluation criteria, and go/no-go criteria. A new approach to the design of formative rubrics is introduced, taking advantage of ICTs, where dichotomization and weighted criteria are combined with the use of go/no-go criteria. The approach is discussed as a method to better guide the learner while adjusting to the student's assimilation pace. Two types of go/no-go criteria (hard and soft) are studied and experimentally validated in a computer-aided design assessment context. Bland-Altman plots are constructed as discussed to further illuminate this topic.This work was partially supported by Grant DPI2017-84526-R (MINECO/AEI/FEDER, UE), Project "CAL-MBE, Implementation and validation of a theoretical CAD quality model in a Model-Based Enterprise (MBE) context."Company, P.; Otey, J.; Agost, M.; Contero, M.; Camba, J. (2019). Teachers as designers of formative e-rubrics: a case study on the introduction and validation of go/no-go criteria. Universal Access in the Information Society. 18(3):675-688. https://doi.org/10.1007/s10209-019-00686-7S675688183Popham, W.J.: What’s wrong—and what’s right—with rubrics. Educ. Leadersh 55(2), 72–75 (1997)Educational Research Service: Focus on: Developing and using instructional rubrics. Educational Research Service (2004)Panadero, E., Jonsson, A.: The use of scoring rubrics for formative assessment purposes revisited: a review. Educ. Res. Rev. 9, 129–144 (2013)Reddy, Y.M., Andrade, H.: A review of rubric use in higher education. Assess. Eval. High. Educ. 35(4), 435–448 (2010)Company, P., Contero, M., Otey, J., Plumed, R.: Approach for developing coordinated rubrics to convey quality criteria in MCAD training. Comput. Aided Des. 63, 101–117 (2015)Company, P., Contero, M., Otey, J., Camba, J.D., Agost, M.J., Perez-Lopez, D.: Web-Based system for adaptable rubrics: case study on CAD assessment. Educ Technol Soc 20(3), 24–41 (2017)Tierney, R., Simon M.: What’s still wrong with rubrics: Focusing on the consistency of performance criteria across scale levels. Pract. Assess. Res. Eval. 9(2) (2004). http://www.pareonline.netLikert, R.: A technique for the measurement of attitudes. Arch. Psychol. 22(140), 55 (1932)Rohrmann, B.: Verbal qualifiers for rating scales: Sociolinguistic considerations and psychometric data. Project Report, University of Melbourne/Australia (2007)Fluckiger, J.: Single point rubric: a tool for responsible student self-assessment. Delta Kappa Gamma Bull. 76(4), 18–25 (2010)Estell, J. K., Sapp, H. M., Reeping, D.: Work in progress: Developing single point rubrics for formative assessment. In: ASEE’s 123rd annual conference and exposition, New Orleans, LA, USA, June 26–29. Paper ID #14595 (2016)Jonsson, A., Svingby, G.: The Use of scoring rubrics: reliability, validity and educational consequences. Educ. Res. Rev. 2, 130–144 (2007)Georgiadou, E., Triantafillou, E., Economides, A.A.: Evaluation parameters for computer-adaptive testing. Br. J. Edu. Technol. 37(2), 261–278 (2006)Company, P., Otey, J., Contero, M., Agost, M.J., Almiñana, A.: Implementation of adaptable rubrics for CAD model quality formative assessment purposes. Int. J. Eng. Educ. 32(2A), 749–761 (2016)Otey, J.: A contribution to conveying quality criteria in mechanical CAD models and assemblies through rubrics and comprehensive design intent qualification. Ph.D. Thesis, Submitted to the Doctoral School of Universitat Politècnica de València (2017)Watson, P.F., Petrie, A.: Method agreement analysis: a review of correct methodology. Theriogenology 73(9), 1167–1179 (2010)Kottner, J., Streiner, D.L.: The difference between reliability and agreement. J. Clin. Epidemiol. 64(6), 701–702 (2011)McLaughlin, P.: Testing agreement between a new method and the gold standard—how do we test. J. Biomech. 46, 2757–2760 (2013)Costa-Santos, C., Bernardes, J., Ayres-de-Campos, D., Costa, A., Costa, C.: The limits of agreement and the intraclass correlation coefficient may be inconsistent in the interpretation of agreement. J. Clin. Epidemiol. 64(3), 264–269 (2011)Chen, C.C., Barnhart, H.X.: Assessing agreement with intraclass correlation coefficient and concordance correlation coefficient for data with repeated measures. Comput. Stat. Data Anal. 60, 132–145 (2013)Bland, J.M., Altman, D.: Statistical methods for assessing agreement between two methods of clinical measurement. The Lancet 327(8476), 307–310 (1986)Van Stralen, K.J., Jager, K.J., Zoccali, C., Dekker, F.W.: Agreement between methods. Kidney Int. 74(9), 1116–1120 (2008)Beckstead, J.W.: Agreement, reliability, and bias in measurement: commentary on Bland and Altman (1986:2010). Int. J. Nurs. Stud. 48, 134–135 (2011)Bland, J.M., Altman, D.: Measuring agreement in method comparison studies. Stat. Methods Med. Res. 8, 135–160 (1999)Giavarina, D.: Understanding Bland–Altman analysis. Biochem. Med. 25(2), 141–151 (2015)GraphPad: Interpreting results: Bland–Altman. Retrieved from https://www.graphpad.com/guides/prism/7/statistics/bland-altman_results.htm?toc=0&printWindow (1995

Poblaciones y comunidades de algas bentónicas en la costa catalana

The populations of benthic algae form communities which are little differenciated in some spots while in others they constitute definite communities with some indicative value. Several profiles of the catalan coast are treated in this paper they have been drawn in accordance with outlines taken on the ground and with the aid of submarine pictures. The profiles, taken at several spots of the coast, reveal some horizonts and facies which are characteristic of the west Mediterranean, this allows us to tabulate the facies more evidents and better characterized according to their exposure to the swell and to the light.Las poblaciones de algas bentónicas forman comunidades que en unos lugares están poco diferenciadas y en otros constituyen comunidades definidas de un cierto valor indicativo. En este trabajo se comentan diversos perfiles de la costa catalana, confeccionadas según esquemas tomados sobre el terreno y auxiliados por fotografías submarinas. Los perfiles, tomados en varias localidades de la costa, revelan algunos horizontes y facies característicos del Mediterráneo occidental, lo que nos permite a modo de síntesis, tabular según su exposición al oleaje y a la luz, las facies más conspicuas y mejor caracterizadas

Web-based system for adaptable rubrics: case study on CAD assessment

[EN] This paper describes the implementation and testing of our concept of adaptable rubrics, defined as analytical rubrics that arrange assessment criteria at multiple levels that can be expanded on demand. Because of its adaptable nature, these rubrics cannot be implemented in paper formats, neither are they supported by current Learning Management Systems (LMS). The main contribution of this work involves the adaptable capability of different levels of detail, which can be expanded for each rubric criterion as needed. Our rubrics platform provides specialized and intuitive tools to create and modify rubrics as well as managing metadata to support learning analytics. As an example of a practical assessment situation, a case study on Mechanical Computer Aided Design (MCAD) systems training is presented. The validation process in this scenario proved the effectiveness of our adaptable rubric platform for supporting formative assessment in a multifaceted and complex field such as MCAD. The system also showed the potential of collecting user interaction metadata, which can be used to analyze the evaluation process and guide further improvements in the teaching strategy.This work was supported by the Spanish Ministry of Economy and Competitiveness and the European Regional Development Fund, through the ANNOTA project (Ref. TIN2013-46036-C3-1-R).Company, P.; Contero, M.; Otey, J.; Camba, J.; Agost, M.; Pérez Lopez, DC. (2017). Web-based system for adaptable rubrics: case study on CAD assessment. Journal of Educational Technology and Society. 20(3):24-41. http://hdl.handle.net/10251/136958S244120

Assessment of the Materials Employed in Green Artificial Reefs for the Galician Estuaries in Terms of Circular Economy

[Abstract] To exploit marine resources in a sustainable way, efficient management systems must be used such as green artificial reefs (GARs). These reefs are mostly made up of renewable and organic materials. When adopting the circular economy (CE) model, industrial processes must be reconsidered. By adapting how conventional artificial reefs (CARs) are engineered and produced to embrace the principles of the CE, certain materials can be used. Renewable resources are designed to be reintroduced into the biosphere without producing harmful organic residues or nutrients. Within a framework that covers economic, environmental and social considerations, this study offers four new proposals related to substituting the materials destined for the components in an artificial reef. For the first time, two different methodologies were applied to determine the best alternative in terms of its contribution to both sustainability and CE. From the results obtained, the best solutions are in line with substituting a certain amount of the cement and sand with mussel shells. The importance of the results lies in the fact that the canning industry in Galicia (northwest Spain) generates shell residues which promote grave environmental consequences.Xunta de Galicia; CN-10MMA003C

Fecundity, spore recruitment and size in Gelidium sesquipedale (Gelidiales,Rhodophyta)

Gelidium sesquipedale fecundity was quantified by counting tetrasporangial sori and cystocarps per meter squared and by estimating the number of spores contained inside them . These were obtained by regression on a size metric of reproductive structures . Tetrasporangial sori length and cystocarp thickness were the best estimators of spore number. To assess spore recruitment, 12 pottery tiles were fixed to the bottom, and the appearance of small fronds was monitored. No clear seasonal pattern of reproduction was found . Tetraspore production peaked in March 1990 with 10.4 x 106 spores m-2, whereas the carpospore peak was lower, 4.9 x 10 5 spores m-2 in July 1989. Recruitment followed tetraspore peaks . The probability of a G. sesquipedale tetraspore making the transition to a recruit was 4.7 x 10-5. Frond length was significantly related to tetrasporangial sori number, while cystocarp number was only related to frond branching order. Minimum size for reproduction was 6.9 cm for gametophytes and 5.4 cm for tetrasporophytes; very rarely were cystocarpic fronds smaller than 9 cm, while tetrasporic fronds were often longer than 15 cm . Cystocarpic fronds were significantly shorter and had more branches than tetrasporic fronds